Don't laugh but one of my favourites is Return of the Saint.
Poorly received at the time, and not well thought of now, but I love it.
Ian Ogilvy gives a new slant to Templar whilst being respectful to the original. Also lovely filming locations in Monaco, France Italy, rather than stock footage.
Great guest cast as well, including Stephen Grieff, John Woodvine, Maurice Roeves, George Cole, Brit Ekland, Kate O'Mara, Mary Tamm, Frederick Jaeger, Judy Geeson, even Sam Wanamaker, and Prunella Gee, Susan Penhaligon, Jenny ' Magpie' Hanley
My favorite episode is Duel in Venice with Maurice Colbourne. Worth checking out.